Quartz-mill.



No. 736,519. PATENTED AUG. 18, 1903..

O. J. HODGE.

QUARTZ MILL. APPLICATION TILED NOV. 10, 1902.

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PATENTED AUG; 18, 1903.

c. J. Hanan.

QUARTZ MILL. APPLICATION FILED NOV. 10, 1902.

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Iatented August 18, 1903.

PATENT OFFI E.

CHARLES J. HODGE, OF HOUGHTON, MICHIGAN.-

QUARTZ-MILL.

SPECIFICATION forming part of Letters Patent N 0. 736,519, dated August 18, 1903.

A lication filed November 10,1902. $erial1 io.130,629. (N model.)

To ctZZ whom it may concern:

Be it known that 1, CHARLES J. HODGE, a citizen of the United States, residing at Houghton, in the county of Houghton, State of Michigan, have invented certain new and useful Improvements in Quartz Mills, of which the following is a full, clear, and exact specification.

My invention relates to that type of quartzmills shown in my United States Patent No. 317,359, for example, in which the material to be crushed or ground is fed between two revolving cones, one of which is periodically moved away from the other to permit the ground material to escape and the unground material to enter between the grinding-faces. The improvements have more especial reference to the means for periodically raising the upper cone; and the invention has for its object to provide means whereby the movable cone will be raised quickly the required distance, but without the shock and jar incident to the operation of mechanism-such, for example, as that employed in my prior patent for accomplishing this movement.

With these ends in view my invention consists in certain features of novelty in the co nstruction, combination, and arrangement of parts by which the said object and certain other objects hereinafter appearing areattained, all as fully described with reference to theaccompanying drawings and more particularly pointed out in the claims.

In the said drawings, Figure 1 is a side elevation of a quartz-mill provided with my improvements, partially broken away and shown in vertical section. Fig. 2 is an enlarged detail view of the cone-lifting mechanism hereinafter described. Fig. 3 is a plan View thereof; and Fig. 4: is a view similar to Fig. 1 looking at a different side of the machine, showing the driving mechanism.

1 is the upper cone, above which is arranged a suitable feed-hopper 2, and 3 is the lower cone, provided with a grinding-face 4, upon which rests a companion face 5 on the under side of the upper cone, all constructed and arranged as usual or in any suitable way.

6 is the vertical pivot of the upper cone,

which is journaled in a sleeve 7 of the lower cone, stepped on the upper side of a nut 8,-

arranged to slide vertically in the sleeve 7, but held against rotary motion therein in any suitable way, as by means of a squared stem. This nut is threaded on an upright screw or shaft 10, which fits accurately in the pivot 6, and is provided at its upper end with a hand-wheel 11, whereby it may be rotated for relatively adjusting the grinding-faces 4 5 of the cones. The lower end of this shaft or screw 10 is supported upon a suitable bearas shown at 19, to permit a projection 20 on Y the cam to readily pass thev lever and lift it in doing so. The periphery of the cam, excepting where the projection 20 is located, is circular, so that the lever 13 will remain stationary until it is engaged by the projection 20, which occurs at each revolution, and consequently at each revolution the upper cone is lifted from the lower cone the proper distance for allowing the ground material to escape and the unground material to enter between the grinding-faces, and the point of engagement between the projection 20 and the lever 13 being considerably removed from the line of the vertical axis of the screw 10 it will be understood that the lifting action will be accomplished without shock and jar, as heretofore, and also with less strain and wear on the journals and the engaging parts. The cam 15 is supported upon the usual drivingshaft 21.

The upper cone may be rotated in any suitable way, as by means of a gear-ring S, secured to the upper side thereof and engaging a spur-gear T, mounted on shaft Ein suitable bearings E and carrying at its lower end a bevel-pinion D, which derives motion from bevel-pinion O on driving-shaft 21, the latter being driven by pulley G, G8 being an idler and F being a fly-wheel.

Having thus described my invention,what I claim as new therein, and desire to secure by Letters Patent, is-- 1. In a quartz-mill the combination of two relatively .movable grindingcones, a step upon which the pivot of one of said cones is mounted, a driving-shaft operatively connected with said cones, a cam on said drivingshaft, and a pivoted lever engaging said cam and supporting said step, substantially as set forth.

2. In a quartz-mill the combination of two relatively movable grinding cones one of which is provided with a vertical pivot, a step supporting said vertical pivot, a drivingshaft, a cam on said shaft having a circular 

